Encoding numeric data - EBCDIC |
EBCDIC Decimals - single digit |
Decimal digits can be represented in EBCDIC in either of two formats: zoned decimal or packed decimal.
Zoned:
| Zone Portion | | Numeric Portion | |
| Z | Z | Z | Z | | 8 | 4 | 2 | 1 | |
| 1 | 1 | 1 | 1 1 | 1 | 0 | 0 1 | 1 | 0 | 1 |
| 1 | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 1 |
11111001 = 9 11001001 = +9 11011001 = -9 |
EBCDIC Decimals - numbers |
+437 Zoned:
<byte> |
<byte> |
<byte> |
1 1 1 1 : 0 1 0 0 |
1 1 1 1 : 0 0 1 1 |
1 1 0 0 : 0 1 1 1 |
zone ( )
: digit(4) |
zone ( )
: digit(3) |
zone(+) :
digit(7) |
+437 Packed:
here the sign nibble occupies the final digit area.
<byte> |
<byte> |
0 1 0 0 : 0 0 1 1 |
0 1 1 1 : 1 1 0 0 |
digit(4)
: digit (3) |
digit(7)
: zone(+) |
[Rev 17/9/98] 27/4/97 © 1997-98 V/2-Com (Verhaart), P O Box 8415, Havelock North, New Zealand.
